S
M
T
W
T
F
S
26
88°
78°
27
87°
79°
28
88°
78°
29
88°
78°
30
89°
77°
31
88°
78°
1
88°
78°
2
87°
77°
3
89°
76°
4
88°
77°
5
90°
77°
6
91°
78°
7
92°
76°
8
91°
78°
9
92°
76°
10
88°
77°
11
92°
77°
12
90°
76°
13
88°
77°
14
88°
77°
15
91°
76°
16
91°
77°
17
90°
77°
18
91°
76°
19
90°
77°
20
91°
78°
21
88°
77°
22
89°
77°
23
91°
76°
24
91°
75°
25
90°
76°
26
88°
75°
27
87°
74°
28
89°
75°
29
88°
74°
30
88°
76°
31
90°
76°
1
90°
74°
2
88°
75°
3
89°
75°
4
90°
74°
5
87°
75°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Fairfax
Fairfax's August 2026 forecast shows daily high temperatures ranging from 87° to 92°, with overnight lows between 74° and 79°. The average high for August is 89° with an average low of 76°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Fairfax. See also: September | October | November.
